我在Ubuntu机器上testing了以下内容。
命令
ping play 结果是
PING play (127.0.53.53) 56(84) bytes of data. 64 bytes from 127.0.53.53: icmp_seq=1 ttl=64 time=0.029 ms 64 bytes from 127.0.53.53: icmp_seq=2 ttl=64 time=0.036 ms 64 bytes from 127.0.53.53: icmp_seq=3 ttl=64 time=0.032 ms 64 bytes from 127.0.53.53: icmp_seq=4 ttl=64 time=0.030 ms
如果我做到以下几点：
ssh play
我可以login到我自己的机器localhost 。
最后是以下几点：
dig play
结果是：
; <<>> DiG 9.8.3-P1 <<>> play ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 55239 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 5, ADDITIONAL: 10 ;; QUESTION SECTION: ;play. IN A ;; ANSWER SECTION: play. 847 IN A 127.0.53.53 ;; AUTHORITY SECTION: play. 170047 IN NS ns-tld2.charlestonroadregistry.com. play. 170047 IN NS ns-tld1.charlestonroadregistry.com. play. 170047 IN NS ns-tld4.charlestonroadregistry.com. play. 170047 IN NS ns-tld5.charlestonroadregistry.com. play. 170047 IN NS ns-tld3.charlestonroadregistry.com. ;; ADDITIONAL SECTION: ns-tld1.charlestonroadregistry.com. 26751 IN A 216.239.XX.XXX ns-tld1.charlestonroadregistry.com. 26751 IN AAAA 2001:4860:4802:32::69 ns-tld2.charlestonroadregistry.com. 26751 IN A 216.239.XX.XXX ns-tld2.charlestonroadregistry.com. 26751 IN AAAA 2001:4860:4802:34::69 ns-tld3.charlestonroadregistry.com. 26751 IN A 216.239.XX.XXX ns-tld3.charlestonroadregistry.com. 26751 IN AAAA 2001:4860:4802:36::69 ns-tld4.charlestonroadregistry.com. 26751 IN A 216.239.XX.XXX ns-tld4.charlestonroadregistry.com. 26751 IN AAAA 2001:4860:4802:38::69 ns-tld5.charlestonroadregistry.com. 26751 IN A 216.239.XX.XXX ns-tld5.charlestonroadregistry.com. 26751 IN AAAA 2001:4860:4805::69 ;; Query time: 4 msec ;; SERVER: 192.XXX.XXX.XXX#53(192.XXX.XXX.XXX) ;; WHEN: Mon Mar 14 16:07:58 2016 ;; MSG SIZE rcvd: 394
（我用XXX的IP地址replace了IP地址的八位字节）
什么是这个奇怪的“玩”主机？
看起来像NCOMF – 阅读这个